Valve.



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VALVE.

APPLICATION IILED 00131, 1910.

Patented Sept. 12, 1911.

b R It Q 1 H W a. 2% N 111: It

UNITED STATES PATENT OFFICE.

CHARLES W. WARD, OF HANCOCK, MICHIGAN.

VALVE.

To all whom it may concern:

Be it known that I, CHARLES IV. WARD, a citizen of the United States ofAmerica, residing at Hancock, in the county of Houghton and State ofMichigan, have invented certain new and useful Improvements in Valves,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention relates to a gate valve especially designed for use as ablow-off valve for steam boilers, and consists in the novel and simpleconstruction thereof and in various details of construction and in theirarrangements and combinations as more fully hereinafter set forth andclaimed.

In the drawings,Figure 1 is a top plan view of a valve mechanismembodying my invention; Figs. 2 and 3 are sections taken on lines :r00and 7 respectively of Fig. 1; and Fig. 4 is a side elevation.

In the drawings thus briefly described, A represents the valve casingformed with a horizontal passageway B extending therethrough and a valvechamber C projecting at right angles to the passageway as shown. In itspreferred form the casing is composed of three sections,twocomplementary members D and E united along their marginal lower edges bybolts, as F, and spaced one from the other to form the valve chamberreferred to, and a cap section G provided with lateral marginal flangesH secured to the complementary sections, as by bolts I, and with apassageway J extending at right angles to the casing passage forming ahousing to contain the operating parts for the valve.

Within the chamber C is located the valve K, in the form of a disk orplate, mounted upon a transverse pivot L for oscillating movement. Anopening M is formed within the plate or valve disk, which registers withthe passageway B, and a series of rack teeth as N are provided upon theupper marginal portion of the valve plate adapted preferably to projectwithin the hollow J of the cap member. Seats are provided for the valvearranged one upon each side thereof,

and are in contact with the disk or plate at all times and thusprotected from the steam exhausting through the passageway.

0 represents one of the valve seats in the form of a ring removablypositioned within a recess a in the casing member D, so as toSpecification of Letters Patent.

Application filed October 31, 1910.

Patented Sept. 12, 1911.

Serial No. 590,004.

contact withthe valve disk. P is a complementary seat, preferablypressed constantly against the valve disk through the agency of a coilspring Q, the seat and spring being positioned in suitable recesses 7)and c in the casing member E. As thus constructed, both seats areconstantly covered by the valve disk, whether the latter is in its openor closed position, and further through the action of the springpressedseat both seats are continuously in proper engagement with the valve,thus preventing any possible leakage of the steam.

The operating means for the valve disk is shown in the preferred form ofa worm R upon an operating shaft S arranged within the housing of thecasing for rotation and held against endwise movement. The shaft chamberis closed at one end by a suitable stufling box, as T, and at theopposite end by a screw-plug T, while the shaft is provided at the endprojecting through the stuffing box with a hand-wheel T For holding theshaft against endwise movement a collar d is formed thereon adapted toabut against a shoulder 0 upon the cap member. The shoulder holds theshaft against movement in one direction, while movement in the other isprevented by the plug T.

From the foregoing description it will be noticed that ease andefiectiveness of oper ation is secured through the particular type ofdrive connection between the shaft and the valve, and the maximumleverage afforded the valve disk by the point of appli cation of powerthereto and the disk pivot being at a maximum distance apart. Attentionis also directed to the fact that by reason of the removable cap forminga part of the casing access may be readily had to the interior of thelatter for the purpose of lubrication or cleansing.

What I claim as my invention is,-

1. In a valve mechanism, the combination with an inclosing casing formedwith a passageway therethrough, a valve chamber transverse to thepassageway, and a shaft housing in the plane of the valve chambercommunicating therewith, of an apertured disk constituting the valvepivoted within its chamber upon the side of the casing passagewayopposite the shaft housing and projecting within the latter, a shaftwithin the housing operable from the exterior of the casing, and a driveconnection between said shaft and the portion of the valve disk engagingthe housing.

2. In a valve mechanism, the combination with an inclosing casing,having a passageway extending therethrough, composed of like adjoiningsections spaced to form a valve chamber therebetween, and a removablecap section mounted upon and uniting the first-mentioned sections, saidcap forming a shaft housing in the plane of the valve chamber andcommunicating therewith, an apertured disk valve pivoted within itschamber for movement into and out of registration with the casingpassage, and an operating shaft within the housing for actuating thevalve.

3. In a valve mechanism, the combination with an inclosing casing formedwith a passageway therethrough, a valve chamber at substantially rightangles to said passage- Way, and an open-ended shaft housing to one sideof and communicating with the valve chamber, having an internal annularshoulder at one end thereof, of an apertured disk valve within thischamber pivoted'for rocking movement having a series of teeth formedupon its periphery adjoining the housing, a screw plug, and a stuflingbox for the housing ends, an operating shaft within the housingprojecting through the stufling box and provided with a collar abuttingagainst the housing shoulder, limiting endwise movement of the shaft inone direction, and a worm upon said shaft engaging the teeth on themarginal portion of the shaft valve.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES WV. IVARD.

Witnesses:

CORNELIUS T. I-IAmzINcToN, MARGARET WARD.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

